Hello together, I will soon take over a Prius from my boss. Since I have always attached importance to good sound in my previous cars I wanted to ask if someone in the Prius has already upgraded something like that? It’s not about an intrusive loud bass or something, but I want to have a strong and above all very good sound in a slightly higher volume. The series audio system has disappointed me more than anything. I don’t think I can do that! To say directly: “I wouldn’t buy the car if it is NOT possible to do something here!” I want to replace the radio with another. I also want to replace the 4 speakers and operate them all over an external final stage. I would have to pull new cables into all doors for this because the originals of the cross-section would not be sufficient. I also want to clamp down the original tweeters and replace them with new ones. I have always spent the 2500 to 3000 euros in my previous Prius vehicles so much for the enjoyment of the music. This should also be so. Now, which speakers fit max into the doors? Where do I get 12V board voltage adapters?